org.springframework.boot.logging.logback.SpringPropertyAction Maven / Gradle / Ivy
/*
* Copyright 2012-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.logging.logback;
import ch.qos.logback.core.joran.action.Action;
import ch.qos.logback.core.joran.action.ActionUtil;
import ch.qos.logback.core.joran.action.ActionUtil.Scope;
import ch.qos.logback.core.joran.spi.ActionException;
import ch.qos.logback.core.joran.spi.InterpretationContext;
import ch.qos.logback.core.util.OptionHelper;
import org.xml.sax.Attributes;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.core.env.Environment;
/**
* Logback {@link Action} to support {@code } tags. Allows logback
* properties to be sourced from the Spring environment.
*
* @author Phillip Webb
*/
class SpringPropertyAction extends Action {
private static final String SOURCE_ATTRIBUTE = "source";
private final Environment environment;
SpringPropertyAction(Environment environment) {
this.environment = environment;
}
@Override
public void begin(InterpretationContext ic, String elementName, Attributes attributes)
throws ActionException {
String name = attributes.getValue(NAME_ATTRIBUTE);
String source = attributes.getValue(SOURCE_ATTRIBUTE);
Scope scope = ActionUtil.stringToScope(attributes.getValue(SCOPE_ATTRIBUTE));
if (OptionHelper.isEmpty(name) || OptionHelper.isEmpty(source)) {
addError(
"The \"name\" and \"source\" attributes of must be set");
}
ActionUtil.setProperty(ic, name, getValue(source), scope);
}
private String getValue(String source) {
if (this.environment == null) {
addWarn("No Spring Environment available to resolve " + source);
return null;
}
String value = this.environment.getProperty(source);
if (value != null) {
return value;
}
int lastDot = source.lastIndexOf(".");
if (lastDot > 0) {
String prefix = source.substring(0, lastDot + 1);
RelaxedPropertyResolver resolver = new RelaxedPropertyResolver(
this.environment, prefix);
return resolver.getProperty(source.substring(lastDot + 1));
}
return null;
}
@Override
public void end(InterpretationContext ic, String name) throws ActionException {
}
}